This shows that the effective time interval of earthquake events is only about 1000 years, and the maximum cycle of seismic activity that we are allowed to infer does not exceed 500 years.
说明迄今的地震事件的有效统计间隔仅仅1000年左右，允许我们能够推断出的最大地震活动周期不会超过500年。
Curves of total stress and time, of cycle pore water pressure and time, of effective stress and time, of effective stress and axial strain are respectively studied.
研究了试样总应力、循环孔隙水压力、有效应力随时间的变化规律及试样有效应力与轴向应变的关系曲线。
Methods Choose correct and effective PCR cycle number according to standard plasmid's amplification curve in real-time PCR;
方法根据标准质粒荧光定量PCR的扩增曲线选择合适有效的扩增循环次数；
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